linux-kernel - Re: Fwd: [Suspend-devel] resume not working on acer ferrari 4005 with radeonfb enabled

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Message-Id: <200611131506.27698.rjw@sisk.pl>
Date:	Mon, 13 Nov 2006 15:06:26 +0100
From:	"Rafael J. Wysocki" <rjw@...k.pl>
To:	"Christian Hoffmann" <Christian.Hoffmann@...lstreetsystems.com>
Cc:	"Pavel Machek" <pavel@....cz>,
	"Benjamin Herrenschmidt" <benh@...nel.crashing.org>,
	"Andrew Morton" <akpm@...l.org>,
	"Solomon Peachy" <pizza@...ftnet.org>,
	linux-fbdev-devel@...ts.sourceforge.net,
	"LKML" <linux-kernel@...r.kernel.org>
Subject: Re: Fwd: [Suspend-devel] resume not working on acer ferrari 4005 with radeonfb enabled

On Monday, 13 November 2006 11:51, Christian Hoffmann wrote:
> 
> > -----Original Message-----
> > From: Pavel Machek [mailto:pavel@....cz] 
> > Sent: Sunday, November 12, 2006 1:14 PM
> > To: Benjamin Herrenschmidt
> > Cc: Christian Hoffmann; Andrew Morton; Solomon Peachy; Rafael 
> > J. Wysocki; linux-fbdev-devel@...ts.sourceforge.net; LKML; 
> > Christian@...e.sisk.pl; Hoffmann@...ercik.sisk.pl
> > Subject: Re: Fwd: [Suspend-devel] resume not working on acer 
> > ferrari 4005 with radeonfb enabled
> > 
> > Hi!
> > 
> > > > Then the radeonfb doesn't kick in at all (guess some pci ids are 
> > > > added in that patch).
> > > > 
> > > > BTW: resume/suspend works ok if I have the vesa fb enabled.
> > > 
> > > In that case (vesafb), when does the screen come back 
> > precisely ? Do 
> > > you get console mode back and then X ? Or it only comes back when 
> > > going back to X ? Do you have some userland-type vbetool 
> > thingy that 
> > > bring it back ?
> > 
> > He's using s3_bios+s3_mode, so kernel does some BIOS calls to 
> > reinit the video. It should come out in text mode, too.
> > 
> > Christian, can you unload radeonfb before suspend/reload it 
> > after resume?
> 
> Will it work if radeonfb is compiled as module? I think I had problems
> with that, but I'll try again.
> 
> > 
> > Next possibility is setting up serial console and adding some 
> > printks to radeon...
> 
> Unfortunatly, the laptop doesn't have serial port. I tried to get a USB
> device (pocketpc) read the USB serial, but I only partially succeeded. I
> can pass console=ttyUSB0 to the kernel and load the ipaq serial console
> driver as it oopses. I am able to echo strings to /dev/ttyUSB0  and read
> them on the ipaq, but I am not able to "deviate" the kernel messages to
> that port. Any hints on how to do that would be very appreciated, I
> didn't find anything usefull on the web. (I tried with setconsole
> /dev/ttyUSB0 but it gives error msg about device busy or something) 

Would it be practicable to use netconsole on your box?  If so, it should work.

Greetings,
Rafael


-- 
You never change things by fighting the existing reality.
		R. Buckminster Fuller
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